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2025-12-21

“polyarch”的英文意思

单词 polyarch
释义 polyarch, a. Bot.|ˈpɒlɪɑːk|
[f. Gr. πολυ-, poly- + ἀρχή beginning, origin.]
Proceeding from many points of origin: said of the primary xylem or woody tissue of a stem or root.
1884Bower & Scott De Bary's Phaner. 351 The xylem is according to the particular case diarch or polyarch, and its starting-points..all lie at equal distances from one another.1914[see hexarch adj. s.v. hexa-].1964H. J. Dittmer Phylogeny & Form in Plant Kingdom xxiii. 563 The xylem may be termed diarch when only two points are present, triarch with three, tetrarch with four, or polyarch with many.
“polyarch”的英文意思

　

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